Cleveland C08169 Aircraft Extension Drill Bit 1/8 in Cobalt

Product Description

The CLEVELAND C08169 is a cobalt aircraft extension drill bit designed for drilling in hard, tough, and abrasive materials where a standard-length bit cannot reach. Built to Series 3722-12 specifications, it features a 135-degree split point for self-centering entry without a center punch, reducing walking on curved or coated surfaces. The cobalt construction with oxide finish provides heat resistance and extended tool life in high-speed drilling applications. With a 12-inch overall length and 2.625-inch spiral flute, this bit is sized for deep-reach drilling in airframe, structural, and industrial maintenance work performed by machinists and maintenance technicians.

This drill bit is suited for aerospace maintenance, structural fabrication, and industrial drilling applications where extended reach is required. The straight cylindrical shank fits standard drill chucks without modification. Right-hand cutting direction and web-thinned tapered web geometry make it effective in metals including steel, stainless, and high-temperature alloys. It is a general-purpose bit appropriate for production and MRO environments where NAS 907 Type J standards apply.

Key Features

• Cobalt construction with oxide finish for heat resistance and durability in hard metals
• 135-degree split point for self-centering entry without a center punch
• 12-inch overall length provides extended reach for deep or obstructed drilling locations
• Web-thinned tapered web reduces thrust and improves chip evacuation
• Right-hand spiral flute, 2.625 inches long, for efficient cutting and chip clearance
• Meets NAS 907 Type J standard for aerospace and industrial applications

Compatibility

Designed as a general-purpose aircraft extension drill bit for use in standard drill chucks accepting a 1/8-inch straight cylindrical shank. Suitable for NAS 907 Type J compliant applications in aerospace and industrial maintenance settings.

Installation Notes

Install in a drill motor or drill press with a chuck rated for the 1/8-inch straight shank diameter. Secure the shank fully in the chuck before operation to prevent runout or bit loss. Use appropriate cutting fluid when drilling stainless steel or high-temperature alloys to extend bit life. Follow shop safety protocols and applicable facility guidelines when working with rotating tooling.